Pulse or digital communications – Transceivers – Modems
Reexamination Certificate
2005-03-29
2005-03-29
Tse, Young T. (Department: 2637)
Pulse or digital communications
Transceivers
Modems
C375S219000
Reexamination Certificate
active
06873653
ABSTRACT:
An apparatus and method is provided for minimizing in channel distortion in an X-DSL line driver is disclosed. The apparatus may be incorporated in an existing X-DSL architecture without additional circuitry. Out of band monitoring of a channel is implemented to adaptively minimize out of band interference and in band distortion. A unique training sequence, suitable for DMT line codes is set forth. The training sequence allows a full spectral characterization of the downstream signal space with a single upstream monitoring tone. The invention may be used with multi-channel X-DSL line drivers interfacing with any of a number of multi-channel supply architectures. The apparatus may be applied with equal advantage to communication protocols other than X-DSL. The apparatus may be applied with equal advantage in wired and wireless media.
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Heidari Sam
Rezvani Behrooz
Smith Dale
Zhang John Zhongxuan
Ahn Sam K.
Cary Charles C
Ikanos Communication Inc.
IP Creators
Tse Young T.
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